feat: add TypeScript Vite config

frontend/vite.config.ts

@@ -0,0 +1,13 @@
+import { defineConfig } from 'vite';
+import { svelte } from '@sveltejs/vite-plugin-svelte';
+
+export default defineConfig({
+  plugins: [svelte()],
+  server: {
+    port: 5173
+  },
+  build: {
+    outDir: 'dist',
+    emptyOutDir: true
+  }
+});